﻿/*
 *  ChgDoc CMS - GNU General Public License, version 3 (GPL-3.0)
 *  Copyright (C)  2012. Ian Quigley
 *  
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 */

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ChgDoc.Entity;

namespace ChgDoc.Edit
{
	[AdminPage( "Role Permissions", "Admin" )]
	public partial class RolePermissions : BasePage
	{
		protected override IEnumerable<FormRule> GetFormRules()
		{
			return new List<FormRuleMapping<Permission>>()
		                {
		                    new FormRuleMapping<Permission>( txtCode, "Code", FormRuleCondition.NotNull, (s,v) => s.Code = (string)v),
                            new FormRuleMapping<Permission>( txtDescription, "Description", FormRuleCondition.NotNull, (s,v) => s.Description = (string)v),
		                };
		}

        internal static string ForRole( long id )
        {
            return "RoleId=" + id;
        }

        private List<RolePermission> _rolePermissions;

		protected void Page_Load( object sender, EventArgs e )
		{
			if (IsPostBack)
				return;

            UpdateDisplay();
		}

		protected void btnSave_click(object sender, EventArgs e)
		{
            Permission model = new Permission();

            if (!PopulateModelFromControls<Permission>(model))
                return;

			model.Save();

            UpdateDisplay();            
		}

        protected void grdList_ItemDataBound(object sender, DataGridItemEventArgs e)
        {
            if ((e.Item.ItemType == ListItemType.Footer) || (e.Item.ItemType == ListItemType.Header))
                return;

            Permission perms = (Permission)e.Item.DataItem;
            LinkButton permit= e.Item.Cells[3].Controls[0] as LinkButton;
            permit.Text = (_rolePermissions.Any(rp => rp.PermissionId == perms.Id))
                ? "Allowed"
                : "Denied";
        }

        protected void grdList_ItemCommand(object sender, DataGridCommandEventArgs e)
        {
            long permissionId = long.Parse(e.Item.Cells[0].Text);
            long roleId = LongParam( "RoleId" );
            if (roleId == 0)
                return;

            switch (e.CommandName)
            {
                case "Change":
                    if (RolePermission.Exists(roleId, permissionId))
                        RolePermission.Delete(roleId, permissionId);
                    else
                        RolePermission.Create(roleId, permissionId);
                    break;
            }

            UpdateDisplay();
        }
    
        private void UpdateDisplay()
        {
            _rolePermissions = RolePermission.ForRole( LongParam( "RoleId", 0 ) );

            grdList.DataSource = Permission.ReadAll();
            grdList.DataBind();

        }        
    }
}